10mm Auto - Cartridge Dimensions

Cartridge Dimensions

10mm Auto Maximum C.I.P. Cartridge Dimensions. All sizes in millimeters (mm).

The 10mm Auto has 1.56 milliliter (24 grain H₂O) cartridge case capacity.

Common rifling twist rate for this cartridge is 381 mm (1 in 15 inches), 5 grooves, Ø lands = 9.91 mm, Ø grooves = 10.16 mm, and land width = 4.47 mm. A large pistol primer is used.

C.I.P. guidelines indicate a maximum pressure of 230 MPa (33,000 psi). In C.I.P. regulated countries, every pistol/cartridge combination is required to be proofed at 130% of this maximum C.I.P. pressure to certify for sale to consumers.

The S.A.A.M.I. pressure limit for the 10mm Auto is set at 258.55 MPa (37,500 psi).